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Habitability Of Surrounding Planets Affected By Super Flares Of Red Dwarfs: NASA

Red dwarfs -- especially young red dwarfs -- are active stars, producing flares blast out energy

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Using NASA’s Hubble Space Telescope, astronomers have found that violent outbursts, or superflares, from red dwarf stars could affect the habitability of any planets orbiting it.

Young low-mass stars flare much more frequently and more energetically than old stars and middle-age stars like our Sun, the findings of the study published in the Astrophysical Journal showed.

The findings are based on observations of the flare frequency of 12 red dwarfs.

Hubble is observing such stars through a large programme called HAZMAT — Habitable Zones and M dwarf Activity across Time.

“M dwarf” is the astronomical term for a red dwarf star — the smallest, most abundant and longest-living type of star in our galaxy.

Hubble Telescope. red dwarf
Hubble Telescope. Flickr

The HAZMAT programme is an ultraviolet survey of red dwarfs at three different ages — young, intermediate, and old.

“The goal of the HAZMAT programme is to help understand the habitability of planets around low-mass stars,” explained the programme’s principal investigator, Evgenya Shkolnik from Arizona State University.

“These low-mass stars are critically important in understanding planetary atmospheres,” Shkolnik added.

Stellar flares from red dwarfs are particularly bright in ultraviolet wavelengths, compared with Sun-like stars.

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Artist’s view of planets transiting red dwarf star in TRAPPIST-1 system. Flickr

Hubble’s ultraviolet sensitivity makes the telescope very valuable for observing these flares.

The flares are believed to be powered by intense magnetic fields that get tangled by the roiling motions of the stellar atmosphere.

When the tangling gets too intense, the fields break and reconnect, unleashing tremendous amounts of energy.

The team found that the flares from the youngest red dwarfs they surveyed — just about 40 million years old — are 100 to 1,000 times more energetic than when the stars are older.

This younger age is when terrestrial planets are forming around their stars.

Red dwarf
This illustration shows a red dwarf star orbited by a hypothetical exoplanet. NASA

About three-quarters of the stars in our Milky Way galaxy are red dwarfs. Most of the galaxy’s “habitable-zone” planets — planets orbiting their stars at a distance where temperatures are moderate enough for liquid water to exist on their surface — orbit red dwarfs.

In fact, the nearest star to our Sun, a red dwarf named Proxima Centauri, has an Earth-size planet in its habitable zone.

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However, red dwarfs — especially young red dwarfs — are active stars, producing flares that could blast out so much energy that it disrupts and possibly strips off the atmospheres of these fledgling planets. (IANS)

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NASA, SpaceX Postpone Historic Astronauts Launch Due to Bad Weather

The launch was delayed due to unfavourable weather in the flight path according to SpaceX

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NASA and SpaceX postponed historic launch of two astronauts to space. Pixabay

NASA and SpaceX postponed historic launch of two astronauts to space from NASA’s Kennedy Space Center in Florida on Wednesday due to bad weather.

“Due to the weather conditions, the launch is scrubbing,” NASA tweeted, Xinhua reported.

SpaceX said the launch was delayed due to unfavourable weather in the flight path.

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The next launch opportunity is scheduled on Saturday, May 30. Pixabay

The next launch opportunity is scheduled on Saturday, May 30.

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A SpaceX Falcon 9 rocket will carry the Crew Dragon spacecraft and veteran NASA astronauts Bob Behnken and Doug Hurley to the International Space Station (ISS).

It will be the first time since 2011 that American astronauts launch on an American rocket from American soil to the ISS. (IANS)

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Moon Mission: NASA Seeking Healthy US Citizens For 8-Month Isolation

NASA is looking for candidates between the ages of 30 and 55

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NASA is looking for healthy individuals for their study on isolation for 8 months. Pixabay

NASA is seeking US citizens for an eight-month study on social isolation in preparation for missions to Mars and the moon.

The international space agency is preparing for its next spaceflight simulation study and is seeking healthy participants to live together with a small crew in isolation for eight months in Moscow, Russia.

Participants will be staying in a lab located in Moscow, and they will experience environmental aspects similar to those astronauts are expected to experience on future missions to Mars that will have crew members from different nations.

NASA is looking for highly motivated and healthy individuals between the ages of 30 and 55 who are fluent in both English and Russian. They must also have an MS., PhD, MD. or have completed military officer training.

The space agency will consider other participants with a bachelor’s degree and other qualifications such as military or professional experience.

They will study the psychological and physiological effects astronauts are likely to face as a result of isolation on long missions.

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NASA is also looking for people who are fluent in both English and Russian. Pixabay

According to NASA, participants will experience environmental aspects similar to those astronauts are expected to experience on future missions to Mars.

A small international crew will live together in isolation for eight months conducting scientific research, using virtual reality and performing robotic operations among a number of other tasks during the lunar mission.

The research is being done to study the effects of isolation and confinement as participants work to complete simulated space missions.

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Results from ground-based missions like this help NASA prepare for the real-life challenges of space exploration and provide important scientific data to solve some of these problems and to develop countermeasures.

Participants will be compensated, and there are varying levels of pay depending on whether you’re associated with NASA.

This study builds on a four-month study conducted in 2019. The SIRIUS-19 analog mission had six participants — two US citizens and four Russians — isolated in a metal habitat that acted as their spacecraft, lunar lander and home. (IANS)

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Scientists to Probe Jupiter’s Violent Storms, Lightning Strikes

Scientists from various organisations probe Jupiter's violent Storms and lightning strikes

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Scientists to probe Jupiter's violent storms and lightning strikes. Pixabay

NASA’s Hubble Space Telescope and the ground-based Gemini Observatory in Hawaii have teamed up with the Juno spacecraft to probe the mightiest storms on the giant planet Jupiter.

The images, part of a multi-year joint programme, revealed that lightning strikes, and some of the largest storm systems that create them, are formed in and around large convective cells over deep clouds of water ice and liquid.

The new observations also confirm that dark spots in the famous Great Red Spot are actually gaps in the cloud cover and not due to cloud colour variations.

Three years of imaging observations using the international Gemini Observatory have probed deep into Jupiter’s cloud tops. The ultra-sharp Gemini infrared images complement optical and ultraviolet observations by Hubble and radio observations by the Juno spacecraft to reveal new secrets about the giant planet.

“The Gemini data were critical because they allowed us to probe deeply into Jupiter’s clouds on a regular schedule,” said Michael Wong of University of California, Berkeley.

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Scientists to probe Jupiter’s violent storms and lightning strikes. Pixabay

“We used a very powerful technique called lucky imaging,” added Wong.

With lucky imaging, a large number of very short exposure images are obtained and only the sharpest images, when the Earth’s atmosphere is briefly stable, are used. The result in this case is some of the sharpest infrared images of Jupiter ever obtained from the ground.

According to Wong, “These images rival the view from space.”

Gemini North’s Near Infrared Imager (NIRI) allows astronomers to peer deep into Jupiter’s mighty storms, since the longer wavelength infrared light can pass through the thin haze but is obscured by thicker clouds high in Jupiter’s atmosphere.

This creates a “jack-o-lantern”-like effect in the images where the warm, deep layers of Jupiter’s atmosphere glow through gaps in the planet’s thick cloud cover.

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Jupiter’s violent storms and lightning strikes to be probed by scientist. Pixabbay

The detailed, multiwavelength imaging of Jupiter by Geminiand Hubble has, over the past three years, proven crucial to contextualizing the observations by the Juno orbiter, and to understanding Jupiter’s wind patterns, atmospheric waves, and cyclones.

The two telescopes, together with Juno, can observe Jupiter’s atmosphere as a system of winds, gases, heat, and weather phenomena, providing coverage and insight not unlike the network of weather satellites meteorologists use to observe Earth.

Because the Hubble and Gemini observations are so important for interpreting Juno data, Wong and his colleagues are making all of the processed data easily accessible to other researchers through the Mikulski Archives for Space Telescopes (MAST) at the Space Telescope Science Institute in Baltimore, Maryland.

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The results were published in The Astrophysical Journal Supplement Series. (IANS)